Ophthalmic structure



FIG. 1 is a perspective view of the ophthalmic structure, showing our new design;

FIG. 2 is a top plan view thereof; and,

FIG. 3 is a side view thereof.

The broken lines shown represent features of the ophthalmic structure not claimed and form no part of the claimed design. 

CLAIM The ornamental design for an ophthalmic structure, as shown and described. 